You can get it from DB by looking into journalarticle table using any of mysql UI editor.

OR

Alternatively try below thing, (take backup of your existing DB before this if its important data in case any thing wrong happens)Extract fresh installation for Liferay bundle and in portal-ext.properties point it to the existing DB which has your web content. And start the server.

So that it will pick all your existing data with fresh Liferay instance.